Arthur is part of Barcelona's squad to face Atletico Madrid on Tuesday, despite the Brazil midfielder's €70 million move to Juventus reportedly being close to completion.
Juve's Miralem Pjanic is set to move in the other direction, although both players will conclude the 2019-20 campaign at their current clubs.
Arthur was seen giving a speech to his team-mates at Barcelona's training session on Monday – an act that has been widely interpreted as the 23-year-old saying his goodbyes to a dressing room he joined in July 2018 from Gremio.